Cellulose-ether composition



tented Sept. 4, 1-923.

COMPANY, OF

YORK, ASSIGNOR TO EASTMAN KODAK A CORPORATION OF NEW YORK.

CELIIULOSE-ETHER COMPOSITION.

' No Drawing.

" To all whom it may concern:

" alogous arts, such, for

Be it known that I, STEWART J; CARROLL, a citizen of the United States of America, residing at Rochester, in the county of Monroe and State of New York, have invented certain new and useful Improvements in Cellulose-Ether Compositions, of which the following is a full, clear, and exact specification.

This invention relates to new compositions of matter in which cellulose ethers are mixed with other substances so that they can be advantageously used ire the plastic and anexample, as sheet or film onvarnish manufacture.

One object" of my invention is to provide compositions of increased utility in the plastie and analogous arts. Another object of my invention is to provide compositions w ich may be made into strong, flexible, transparent films, Further objects will hereinafter appear.

I have discovered that acomposition of matter having these desired characteristics can be obtained by mixing or com ounding cellulose ether, say of the type in icated in U. S. Patent 1,188,376, Lilienfeld, June 20, 1916, with methylene chlorid. In the preferred forms of my-invention I may add one or more of the followingalkyl compounds: monohydroxy aliphatic alcohols of less tlTan six carbon atoms, the acetates of such alcohols, acetone. While methylene chlorid, by itself, is a useful solvent for film making I prefer to use with it, one or more volatile vehicles to carry the evaporation, such as cohol, ethyIacetate, methyl acetate, acetone.

By way of illustration, I ma dissolve cellulose ether, like water-insoluble ethyl cellulose, in methylene chlorid, say one part by weight of the ether to from 4 to 6 parts of the solvent. I prefer, however, to use from moulded articles, etc. I

ingredients and control; ethyl alcohol, methyl al-- Application filed March 3, 1922. Serial No. 540,860.

with from 10 to 90 pounds, such as stance, an excellent viscous film-making dope is prepared by dissolving one part by weight of said ethyl cellulose in from 4 to 6 (say 5) parts of a mixed solvent containing methylene chlorid and methyl acetate in the ratio of 25 parts by Weight of the former to 75 parts of the latter. 1

Other substances Which impart useful qualities to the film may be added, if desired, such as triphenyl or tricresyl phosphate, camphor, monochlornaphthalene, etc. e ingredients are of the commercial type, sufiiciently purified for the purpose in view. For fihn dopes, theyare prepared to yield parts of saidalkyl commethyl acetate For inparts of methylene chlorid mixed films of the proper relative freedom from.

color. I

Having thus described my invention, what claim as new and desire to secure by Letters Patent is:

1. A composition of matter comprising cellulose ether and methylene chlorid.

2. A composition of matter, comprisin cellulose ether dissolved in methylene chlorid and a volatile vehicle carrying-l said ether and said methylene chlorid.

3. A composition of matter comprising cellulose ether, methylene chlorid and methyl acetate.

composition of matter comprising cellulose ether dissolved in a mixture containin from 90 to 10 parts by weight of methyIene chlorid and 10 to 90 parts of a volatile vehicle carryingsaid ingredients.

5. A viscous flowable composition comprising one part by weight of water-insoluw ble ethyl cellulose, and from 4110 6 parts of a solvent containing meth lene chlorid.

Signed at Rochester, blew York, this 27 day of February 1922.

STEWART J. CARROLL. 

